package com.nowcoder.community.controller;


import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;

import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.*;

import javax.imageio.ImageIO;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger= LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;



    @RequestMapping(path = "/register",method = RequestMethod.GET)
    public String getRegisterPage(){
        return "/site/register";
    }

    @RequestMapping(path = "/login",method = RequestMethod.GET)
    public String getLoginPage(){
        return "/site/login";
    }

    @RequestMapping(path = "/register",method = RequestMethod.POST)
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);

        if(map==null||map.isEmpty()){
            model.addAttribute("msg","注册成功，我们已经像你的邮箱发送了一封激活邮件，请尽快激活！");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));
            model.addAttribute("emailMsg",map.get("emailMsg"));
            return "/site/register";
        }
    }

    @RequestMapping(path = "/activation/{userId}/{code}",method = RequestMethod.GET)
    public String activation(Model model,
                             @PathVariable("userId") int userId,
                             @PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if(result==ACTIVATION_SUCCESS){
            model.addAttribute("msg","激活成功！");
            model.addAttribute("target","/login");
        } else if (result==ACTIVATION_REPEAT) {
            model.addAttribute("msg","无效操作，该账号已经激活！");
            model.addAttribute("target","/index");
        }else {
            model.addAttribute("msg","激活失败，激活码有误！");
            model.addAttribute("target","/index");
        }
        return "/site/operate-result";
    }

    @RequestMapping(path = "/kaptcha",method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        String text = kaptchaProducer.createText();
        System.out.println(text);
        BufferedImage image = kaptchaProducer.createImage(text);

        //session.setAttribute("kaptcha",text);

        //验证码存在redis
        //验证码的归属
        String kaptchaOwner = CommunityUtil.genrateUUID();
        Cookie cookie=new Cookie("kaptchaOwner",kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存在redis
        String redisKey= RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        response.setContentType("image/png");
        try {
            OutputStream os = response.getOutputStream();
            ImageIO.write(image,"png",os);
        } catch (IOException e) {
             logger.error("响应验证码失败"+e.getMessage());
        }

    }

    @RequestMapping(path = "/login",method = RequestMethod.POST)
    public String login(String username,String password,String code,boolean remember,
                        Model model,/*HttpSession session,*/HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){

        //String kaptcha = (String) session.getAttribute("kaptcha");

        String kaptcha=null;
        if(StringUtils.isNotBlank(kaptchaOwner)){
            String redisKey=RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha= (String) redisTemplate.opsForValue().get(redisKey);
        }


        if(StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equalsIgnoreCase(code)){
            model.addAttribute("codeMsg","验证码不正确!");
            return "/site/login";
        }

        int expiredSeconds=remember?REMEMBER_EXPIRED_SECONDS:DEFAULT_EXPIRED_SECONDS;

        Map<String, Object> map = userService.login(username, password, expiredSeconds);

        if(map.containsKey("ticket")){
            Cookie cookie=new Cookie("ticket",map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg",map.get("passwordMsg"));

            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout",method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        return "redirect:/login";
    }

}
